Related literature
For background to Schiff bases, see: Cimerman et al. (1997).
Experimental
Crystal data
C8H9N3O2 Mr = 179.18 Orthorhombic, P b c a a = 10.585 (2) Å b = 10.019 (2) Å c = 16.311 (3) Å V = 1729.8 (6) Å3 Z = 8 Mo Kα radiation μ = 0.10 mm−1 T = 293 K 0.26 × 0.21 × 0.19 mm
|
Data collection
Bruker SMART CCD diffractometer Absorption correction: none 15411 measured reflections 1984 independent reflections 1794 reflections with I > 2σ(I) Rint = 0.028
|
D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A | N1—H1A⋯N4i | 0.86 | 2.12 | 2.9751 (14) | 171 | Symmetry code: (i) . | |
Data collection: SMART (Bruker, 1997); cell refinement: SAINT (Bruker, 1997); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supporting information
A mixture of nicotinaldehyde (0.1 mol), and methyl carbazate (0.1 mol) was stirred in refluxing ethanol (20 mL) for 4 h to afford the title compound (0.082 mol, yield 82%). Colourless blocks of (I) were obtained by recrystallization from ethanol at room temperature.
H atoms were fixed geometrically and allowed to ride on their attached atoms.
Structure description
top For background to Schiff bases, see: Cimerman et al. (1997).
Data collection: SMART (Bruker, 1997); cell refinement: SAINT (Bruker, 1997); data reduction: SAINT (Bruker, 1997); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).
Methyl 3-(3-pyridylmethylene)carbazate
top Crystal data top C8H9N3O2 | Dx = 1.376 Mg m−3 |
Mr = 179.18 | Mo Kα radiation, λ = 0.71073 Å |
Orthorhombic, Pbca | Cell parameters from 1985 reflections |
a = 10.585 (2) Å | θ = 3.4–27.5° |
b = 10.019 (2) Å | µ = 0.10 mm−1 |
c = 16.311 (3) Å | T = 293 K |
V = 1729.8 (6) Å3 | Block, colourless |
Z = 8 | 0.26 × 0.21 × 0.19 mm |
F(000) = 752 | |
Data collection top Bruker SMART CCD diffractometer | 1794 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.028 |
Graphite monochromator | θmax = 27.5°, θmin = 3.1° |
ω scans | h = −13→13 |
15411 measured reflections | k = −13→12 |
1984 independent reflections | l = −21→21 |
Refinement top Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.046 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.128 | H-atom parameters constrained |
S = 1.08 | w = 1/[σ2(Fo2) + (0.0867P)2 + 0.1822P] where P = (Fo2 + 2Fc2)/3 |
1984 reflections | (Δ/σ)max < 0.001 |
118 parameters | Δρmax = 0.24 e Å−3 |
0 restraints | Δρmin = −0.32 e Å−3 |
Crystal data top C8H9N3O2 | V = 1729.8 (6) Å3 |
Mr = 179.18 | Z = 8 |
Orthorhombic, Pbca | Mo Kα radiation |
a = 10.585 (2) Å | µ = 0.10 mm−1 |
b = 10.019 (2) Å | T = 293 K |
c = 16.311 (3) Å | 0.26 × 0.21 × 0.19 mm |
Data collection top Bruker SMART CCD diffractometer | 1794 reflections with I > 2σ(I) |
15411 measured reflections | Rint = 0.028 |
1984 independent reflections | |
Refinement top R[F2 > 2σ(F2)] = 0.046 | 0 restraints |
wR(F2) = 0.128 | H-atom parameters constrained |
S = 1.08 | Δρmax = 0.24 e Å−3 |
1984 reflections | Δρmin = −0.32 e Å−3 |
118 parameters | |
Special details top Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes. |
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger. |
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top | x | y | z | Uiso*/Ueq | |
O2 | 0.18815 (8) | 0.11348 (8) | 0.57072 (5) | 0.0433 (2) | |
C3 | 0.35300 (9) | −0.17778 (10) | 0.74434 (7) | 0.0343 (3) | |
H3A | 0.4286 | −0.1375 | 0.7291 | 0.041* | |
N4 | 0.48145 (8) | −0.43908 (10) | 0.88319 (6) | 0.0390 (3) | |
C5 | 0.35393 (9) | −0.28611 (10) | 0.80449 (6) | 0.0311 (2) | |
N1 | 0.26042 (8) | −0.03820 (9) | 0.65555 (6) | 0.0372 (2) | |
H1A | 0.3336 | −0.0124 | 0.6391 | 0.045* | |
C4 | 0.24493 (9) | −0.34567 (12) | 0.83549 (7) | 0.0377 (3) | |
H4B | 0.1656 | −0.3156 | 0.8194 | 0.045* | |
N2 | 0.24948 (8) | −0.13809 (9) | 0.71265 (5) | 0.0345 (2) | |
C2 | 0.15392 (9) | 0.01936 (10) | 0.62537 (6) | 0.0339 (3) | |
O1 | 0.04701 (7) | −0.00686 (10) | 0.64392 (6) | 0.0541 (3) | |
C6 | 0.46946 (9) | −0.33613 (11) | 0.83129 (6) | 0.0358 (3) | |
H6A | 0.5428 | −0.2957 | 0.8120 | 0.043* | |
C8 | 0.37535 (11) | −0.49405 (11) | 0.91219 (7) | 0.0393 (3) | |
H8A | 0.3819 | −0.5651 | 0.9486 | 0.047* | |
C7 | 0.25615 (10) | −0.44962 (12) | 0.89025 (7) | 0.0414 (3) | |
H7A | 0.1845 | −0.4896 | 0.9123 | 0.050* | |
C1 | 0.08717 (14) | 0.19038 (13) | 0.53648 (8) | 0.0523 (3) | |
H1B | 0.1209 | 0.2546 | 0.4987 | 0.078* | |
H1C | 0.0430 | 0.2359 | 0.5796 | 0.078* | |
H1D | 0.0298 | 0.1322 | 0.5082 | 0.078* | |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
O2 | 0.0420 (5) | 0.0450 (5) | 0.0429 (5) | 0.0031 (3) | 0.0027 (3) | 0.0115 (3) |
C3 | 0.0289 (5) | 0.0385 (5) | 0.0355 (5) | −0.0040 (4) | −0.0007 (4) | 0.0006 (4) |
N4 | 0.0315 (5) | 0.0440 (5) | 0.0415 (5) | 0.0086 (4) | −0.0001 (4) | 0.0016 (4) |
C5 | 0.0289 (5) | 0.0341 (5) | 0.0302 (5) | −0.0005 (4) | −0.0009 (3) | −0.0034 (4) |
N1 | 0.0277 (4) | 0.0426 (5) | 0.0413 (5) | −0.0042 (3) | −0.0005 (3) | 0.0102 (4) |
C4 | 0.0257 (5) | 0.0467 (6) | 0.0407 (6) | −0.0008 (4) | −0.0037 (4) | 0.0042 (4) |
N2 | 0.0325 (4) | 0.0364 (5) | 0.0346 (4) | −0.0039 (3) | −0.0018 (3) | 0.0033 (3) |
C2 | 0.0324 (5) | 0.0363 (5) | 0.0330 (5) | −0.0018 (4) | −0.0015 (4) | 0.0005 (4) |
O1 | 0.0284 (4) | 0.0685 (6) | 0.0656 (6) | −0.0020 (4) | −0.0018 (4) | 0.0220 (5) |
C6 | 0.0263 (5) | 0.0430 (6) | 0.0380 (5) | 0.0009 (4) | 0.0026 (4) | −0.0003 (4) |
C8 | 0.0400 (6) | 0.0373 (5) | 0.0407 (5) | 0.0030 (4) | −0.0004 (4) | 0.0038 (4) |
C7 | 0.0312 (5) | 0.0465 (6) | 0.0463 (6) | −0.0069 (4) | 0.0005 (4) | 0.0064 (5) |
C1 | 0.0603 (8) | 0.0478 (6) | 0.0489 (7) | 0.0117 (6) | −0.0049 (6) | 0.0102 (5) |
Geometric parameters (Å, º) top O2—C2 | 1.3472 (13) | N1—H1A | 0.8600 |
O2—C1 | 1.4312 (15) | C4—C7 | 1.3771 (16) |
C3—N2 | 1.2752 (13) | C4—H4B | 0.9300 |
C3—C5 | 1.4631 (14) | C2—O1 | 1.2005 (13) |
C3—H3A | 0.9300 | C6—H6A | 0.9300 |
N4—C8 | 1.3373 (14) | C8—C7 | 1.3850 (15) |
N4—C6 | 1.3403 (14) | C8—H8A | 0.9300 |
C5—C6 | 1.3920 (13) | C7—H7A | 0.9300 |
C5—C4 | 1.3940 (13) | C1—H1B | 0.9600 |
N1—C2 | 1.3586 (13) | C1—H1C | 0.9600 |
N1—N2 | 1.3719 (12) | C1—H1D | 0.9600 |
| | | |
C2—O2—C1 | 115.73 (9) | O2—C2—N1 | 108.28 (9) |
N2—C3—C5 | 120.59 (9) | N4—C6—C5 | 123.96 (9) |
N2—C3—H3A | 119.7 | N4—C6—H6A | 118.0 |
C5—C3—H3A | 119.7 | C5—C6—H6A | 118.0 |
C8—N4—C6 | 117.44 (9) | N4—C8—C7 | 122.77 (10) |
C6—C5—C4 | 117.33 (9) | N4—C8—H8A | 118.6 |
C6—C5—C3 | 118.92 (8) | C7—C8—H8A | 118.6 |
C4—C5—C3 | 123.73 (8) | C4—C7—C8 | 119.29 (10) |
C2—N1—N2 | 119.05 (8) | C4—C7—H7A | 120.4 |
C2—N1—H1A | 120.5 | C8—C7—H7A | 120.4 |
N2—N1—H1A | 120.5 | O2—C1—H1B | 109.5 |
C7—C4—C5 | 119.18 (9) | O2—C1—H1C | 109.5 |
C7—C4—H4B | 120.4 | H1B—C1—H1C | 109.5 |
C5—C4—H4B | 120.4 | O2—C1—H1D | 109.5 |
C3—N2—N1 | 115.47 (8) | H1B—C1—H1D | 109.5 |
O1—C2—O2 | 124.99 (10) | H1C—C1—H1D | 109.5 |
O1—C2—N1 | 126.73 (10) | | |
Hydrogen-bond geometry (Å, º) top D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···N4i | 0.86 | 2.12 | 2.9751 (14) | 171 |
Symmetry code: (i) −x+1, y+1/2, −z+3/2. |
Experimental details
Crystal data |
Chemical formula | C8H9N3O2 |
Mr | 179.18 |
Crystal system, space group | Orthorhombic, Pbca |
Temperature (K) | 293 |
a, b, c (Å) | 10.585 (2), 10.019 (2), 16.311 (3) |
V (Å3) | 1729.8 (6) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.10 |
Crystal size (mm) | 0.26 × 0.21 × 0.19 |
|
Data collection |
Diffractometer | Bruker SMART CCD |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 15411, 1984, 1794 |
Rint | 0.028 |
(sin θ/λ)max (Å−1) | 0.649 |
|
Refinement |
R[F2 > 2σ(F2)], wR(F2), S | 0.046, 0.128, 1.08 |
No. of reflections | 1984 |
No. of parameters | 118 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.24, −0.32 |
Hydrogen-bond geometry (Å, º) top D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···N4i | 0.86 | 2.12 | 2.9751 (14) | 171 |
Symmetry code: (i) −x+1, y+1/2, −z+3/2. |
Acknowledgements
The authors would like to thank the Science Foundation of Weifang University (No. 2009Z24).
References
Bruker (1997). SMART and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Cimerman, Z., Galic, N. & Bosner, B. (1997). Anal. Chim. Acta, 343, 145–153. CrossRef CAS Web of Science Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
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